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Date: Fri, 15 May 2009 11:55:25 +0200
From: Vincent Minet <vincent@...cent-minet.net>
To: linux-ext4@...r.kernel.org
Subject: [PATCH] ext4: Fix spinlock assertions on UP systems
On UP systems without DEBUG_SPINLOCK, ext4_is_group_locked always fails
which triggers a BUG_ON() call.
This patch fixes it by using assert_spin_locked instead.
Signed-off-by: Vincent Minet <vincent@...cent-minet.net>
---
fs/ext4/ext4.h | 6 ------
fs/ext4/mballoc.c | 10 +++++-----
2 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 7386b80..fec8acb 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1598,12 +1598,6 @@ static inline void ext4_unlock_group(struct super_block *sb,
spin_unlock(ext4_group_lock_ptr(sb, group));
}
-static inline int ext4_is_group_locked(struct super_block *sb,
- ext4_group_t group)
-{
- return spin_is_locked(ext4_group_lock_ptr(sb, group));
-}
-
/*
* Inodes and files operations
*/
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 14a3b77..fe7db8b 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -449,7 +449,7 @@ static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b,
if (unlikely(e4b->bd_info->bb_bitmap == NULL))
return;
- BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+ assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group));
for (i = 0; i < count; i++) {
if (!mb_test_bit(first + i, e4b->bd_info->bb_bitmap)) {
ext4_fsblk_t blocknr;
@@ -473,7 +473,7 @@ static void mb_mark_used_double(struct ext4_buddy *e4b, int first, int count)
if (unlikely(e4b->bd_info->bb_bitmap == NULL))
return;
- BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+ assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
for (i = 0; i < count; i++) {
BUG_ON(mb_test_bit(first + i, e4b->bd_info->bb_bitmap));
mb_set_bit(first + i, e4b->bd_info->bb_bitmap);
@@ -1128,7 +1128,7 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
struct super_block *sb = e4b->bd_sb;
BUG_ON(first + count > (sb->s_blocksize << 3));
- BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+ assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group));
mb_check_buddy(e4b);
mb_free_blocks_double(inode, e4b, first, count);
@@ -1209,7 +1209,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int order, int block,
int ord;
void *buddy;
- BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+ assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
BUG_ON(ex == NULL);
buddy = mb_find_buddy(e4b, order, &max);
@@ -1273,7 +1273,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3));
BUG_ON(e4b->bd_group != ex->fe_group);
- BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+ assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
mb_check_buddy(e4b);
mb_mark_used_double(e4b, start, len);
--
1.6.3
--
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